西风逍遥游andCursor Agent
1fe6934c0a
* feat(graphics): texture cell bombing to break tiling Add UV-space cell bombing on the default mesh3d / clustered PBR paths: per-cell random offset and rotation blended across a 2x2 neighborhood (with textureGrad for stable mips). Opt-in via Renderable3D::setTexCellBomb (strength 0 keeps prior behavior). Includes GLSL helper, SPIR-V embeds, CPU reference header, docs, and smoke tests. Co-authored-by: 西风逍遥游 <sunxfancy@gmail.com> * fix(graphics): rotate UVs in cell bombing; harden GPU test Rotate UVs about each cell center (not just translate) so periodic textures actually break tiling. Use the known-good UV cube + repeating motif in the pixel smoke test. Co-authored-by: 西风逍遥游 <sunxfancy@gmail.com> --------- Co-authored-by: Cursor Agent <cursoragent@cursor.com>
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
#include "zeroerr/assert.h"
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#include "zeroerr/unittest.h"
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#include <cmath>
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#include "graphics/TextureCellBomb.h"
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using eve::graphics::TexCellBombParams;
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using eve::graphics::texBombHash22;
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using eve::graphics::texCellBombSampleUV;
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TEST_CASE("TextureCellBomb.hash22InUnitInterval") {
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for (int y = -3; y <= 5; ++y) {
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for (int x = -3; x <= 5; ++x) {
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float hx = 0.f, hy = 0.f;
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texBombHash22(float(x), float(y), hx, hy);
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CHECK(hx >= 0.f);
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CHECK(hx < 1.f);
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CHECK(hy >= 0.f);
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CHECK(hy < 1.f);
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}
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}
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}
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TEST_CASE("TextureCellBomb.strengthZeroIsIdentity") {
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TexCellBombParams p;
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p.cellScale = 8.f;
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p.strength = 0.f;
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p.rotAmount = 1.f;
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float ou = -1.f, ov = -1.f;
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texCellBombSampleUV(0.37f, 0.81f, p, ou, ov);
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CHECK(std::fabs(ou - 0.37f) < 1e-6f);
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CHECK(std::fabs(ov - 0.81f) < 1e-6f);
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}
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TEST_CASE("TextureCellBomb.strengthPerturbsUV") {
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TexCellBombParams p;
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p.cellScale = 4.f;
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p.strength = 1.f;
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p.rotAmount = 1.f;
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float ou = 0.f, ov = 0.f;
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texCellBombSampleUV(0.25f, 0.25f, p, ou, ov);
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const float du = ou - 0.25f;
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const float dv = ov - 0.25f;
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CHECK(du * du + dv * dv > 1e-6f);
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}
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TEST_CASE("TextureCellBomb.neighborCellsDiffer") {
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TexCellBombParams p;
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p.cellScale = 2.f;
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p.strength = 1.f;
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p.rotAmount = 0.5f;
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float a0 = 0.f, a1 = 0.f, b0 = 0.f, b1 = 0.f;
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// Same fractional position in adjacent cells → different offsets.
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texCellBombSampleUV(0.1f, 0.1f, p, a0, a1);
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texCellBombSampleUV(0.6f, 0.1f, p, b0, b1);
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CHECK(std::fabs((a0 - 0.1f) - (b0 - 0.6f)) + std::fabs((a1 - 0.1f) - (b1 - 0.1f)) > 1e-4f);
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}
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